title: mu-Opioid receptor knockout mice display reduced cocaine conditioned place preference but enhanced sensitization of cocaine-induced locomotion.
mesh_terms: D000704:Analysis of Variance; D000779:Anesthetics, Local / Q000494:pharmacology*; D000818:Animals; D001522:Behavior, Animal; D003042:Cocaine / Q000494:pharmacology*; D003216:Conditioning, Operant / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D006579:Heterozygote; D006720:Homozygote; D008124:Locomotion / Q000187:drug effects* / Q000235:genetics; D051379:Mice; D018345:Mice, Knockout; D017450:Receptors, Opioid, mu / Q000172:deficiency / Q000235:genetics / Q000378:metabolism*
chemical_list: D000779:Anesthetics, Local; D017450:Receptors, Opioid, mu; D003042:Cocaine